Drive-wheel.



F. DIEHL.

I DRIVE WHEEL.

APPLICATION FILED IULY 26, I916- 1, 253,795. Patented Jan. 15, 1918.

the arts together.

UNITED STATES PATENT OFFICE.

mannnrcir DIEHL, or ELIZABETH, NEW .rnasnx, assroivoa 'ro DIEHL MANUFAC- runme co., or nmzann'rn, NEW JERSEY, a oonrona'rron or new mnsmr.

DRIVE-WHEEL.

Specification of Letters Patent.

Patented Jan. 15,1918.

that its application is not limited to this use.

One of the objects of the invention is to provide an improved driving wheel which may be readily and inexpenslvely manufactured.

Another object is to provide an im roved driving wheel which has a friction riving rim and a bod of molded material.

A further 0 ject is to provide a wheel of improved construction that will be substantially noiseless.

Other objects and advantages will here-- inafter a pear.

An em odiment of the invention is shown in the accompanying drawings. The views of the drawings are as follows:

Figure 1 is a perspective view of a complete wheel embodying the invention.

Fig. 2 is an end elevation thereof.

Fig. 3 is a side elevation thereof.

Fig. 4 is a cross section view taken on the line 44 of Fig. 2.

Fig. 5 is a cross section view line 55 of Fig. 3.

Fig. 6 is a separated perspective view of several of the elements comprisin the wheel.

Fig. 7 is a view showing the w eel'as used with an electric motor for driving a sewing machine.

The wheel comprises, in tion driving element 1 of cor metal sleeve 2, a metal bushing of molded insulating materia taken on the neral, a fricor the like, a 3 and a body 4 for holding element 1 forms the rim of e drivin g constitutes a friction surface the wheel an which engages the mechanism to be driven.

he rim is preferably made out of cork though other suitable material may be used. Cork is l' ht, inexpensive, lends itself readily to manu acturing processes and forms an excellent 'ppingsurface for wheels used with smal motors. The rim is madefrom a circular blank. by punching a substantially are held together by under the stress o rectangular o ening 5 therein, said opening being adapte to receive the metal sleeve 2.

he rim may, in some cases, be made of metal and other materials, and it may have teeth out in it if desired.

The sleeve 2 is shaped to fit the rectangular opening 5 in" the rim 1, the sleeve being made slightly larger than said opening so that when forced into the openin it is automatically held in position. his sleeve serves to protect the cork driving element in a manner which will be hereinafter described.

The metal bushin 3 is made of a size and shape suitable for tting onto the shaft of the driving member with which the wheel is to be used. In the embodiment shown the bushing has a head provided with an open ing for a set screw for fastening the wheel to the driving shaft.

The rim 1, the sleeve 2 and the bushing 3 terial 4 preferably bakelite. Bakelite is an insulating material made from phenolic condensation products. It has the property of hardening under the action of heatand pressure without shrinking in volume. It is also a good insulatin material, it resists the action of acids, and does not soften under the action of heat. It securely holds the elements 1, 2 and 3 together and willnot loosen practical conditions. It

also has a certain amount of resilience so that it absorbs shocks and reduces the noise' caused b vibrations and shocks to a minimum. her suitable materials capable of being molded into. shape and hardened may be used, as for example condensite.

It has been found that whenbakelite is molded about cork and baked and hardened, it penetrates the cork if the metal sleeve 2 is not used and seriously interferes with the qualities of the cork as a driving element.

e cork becomes hard, non-resilient and loses ing qualities. Also the cork is disto .an put under a burstin strain which material y weakens it. B p acing a metal bushing in the opening in t e cork rim and thereafter molding the bakelite around the arts, a rug d wheelis produced in whic the cork as the requisite drivin qualities and is not placed under interns stresses.

The wheel may be readily and inex ena body of molded ma-' filling forms a very compact, neat and eflicient device. It is particularly ada ted for use in driving sewing machines w ere the drive wheel engages the rim of the balance wheel of the machine;

It is to be understood that the structure shown is for purposes of illustration only and that other structures may be devised which come within the spirit and scope of the appended claims.

What I claim and desire to secure by United States Letters Patent is 1. The method of making a drive'wheel which consists in arrangin a 'hub within and in spaced relation to a riving rim, filling the space between said parts with "a plastic material and hardening said material to hold the parts together.

2. The method of making a drive wheel which consists in arranging a hub within a driving rim, filling the space between said parts with a phenolic condensation product and hardening said material under the action of heat and pressure.

3. Themethod of making a drive wheel which consists in arranging a hub within a driving rim, filling the space between said parts with bakelite compound and hardenmg said material under the action of heat anil plressure.

he method of making a drive wheel which consists in arranging a hub within and in spaced relation to a riving rim, the space between said parts with a plastic material and hardening said material under the action of heat and, pressure to hold the parts together.

5. The method of making a drive wheel which consists in arranging a hub within and in spaced relation to a driving rim and filling the space between said parts with a molded material to hold the parts together.

6. A drive wheel having a hub and a drivin rim, and a body of material molded to sai parts to entirel support said rim and hold the parts toget er.

7. A drive wheel having a hub and a driving rim, and a body composed of phenolic conlcllensation products to hold said parts tot er. 8. A drive wheel havin a hub and a driving'rim, and a body of akelite to hold said parts together.

9. A drive wheel comprisin a hub, a driving rim of cork or the li e, a metal sleeve surrounding the inner periphery of the cork rim, and a body of material molded about said parts to hold them together.

10. A drive wheel comprising. a hub, a

driving rim of cork or the like,'a metal sleeve surrounding the inner per hery of the cork rim, and a body composed of henolic condensation material molded a out said parts to hold them'together.

11. A drive wheel comprisin a hub, a driving rim of cork or the l' e, a .metal sleeve surrounding the inner periphery of the cork rim and a body of bakelite molded about said parts and hardened for holding them together.

12. A driving wheel havin a driving rim and a body portion formed 0 material molded about the ixmer portion of'said rim.

In witness whereof, I have hereunto submy name in the presence of two witnesses.

' FREDERICK DIEHL. Witnesses C. H. Momma, H. L. Zanmsxm. 

